808 snare PCBs

jzurd0 · Post by **jzurd0** » Tue Apr 29, 2014 7:04 am

Hi there, could you please let me know how can I buy one pcb?

Thanks!!!

duff · Post by **duff** » Tue Apr 29, 2014 8:58 am

Thanks for the info

falafelbiels · Post by **falafelbiels** » Tue Apr 29, 2014 10:42 am

jzurd0 wrote:Hi there, could you please let me know how can I buy one pcb?

Thanks!!!

Simply by expressing your interest in this thread. I will put you on the list, alright?

So now I better start making a list...

falafelbiels · Post by **falafelbiels** » Tue Apr 29, 2014 11:34 am

List is at the bottom of the original post now...

This is the .ai file that I use to laser cut the panels. I don't know if this will immediately work on any machine, but it will at least give you something to get started with. Check the line colors after transfer, mines always go awry.
One can also use this to make a drill-guide for home-drilling.

since the panel-mounted components are also board-mounted, you will probably need this to successfully complete the project.
You can also order a panel and I will cut something up for you; say, 10 euro?

aladan · Post by **aladan** » Tue Apr 29, 2014 7:33 pm

One for me, please...
Thanks!

falafelbiels · Post by **falafelbiels** » Tue Apr 29, 2014 7:47 pm

Aladan added

Okay people,

Here's the deal for now:
I have ordered just 10 board sets and have 5 sets left from the latest (succesful) proto batch. I want to build 1 more for myself so that leaves 14 sets, maybe more because itead sometimes give you more than you ask for. Anyway we so far have eleven guys showing interest so that leaves 3 more sets....

..............

falafelbiels · Post by **falafelbiels** » Wed May 07, 2014 4:28 am

Well, guess what showed up this morning...

I will be PMing you guys on the list today.

falafelbiels · Post by **falafelbiels** » Wed May 07, 2014 4:49 am

Also, not taking any more orders until I have shipped what's on the list....

falafelbiels · Post by **falafelbiels** » Wed May 07, 2014 5:56 am

The pots I have used thus far:

http://www.taydaelectronics.com/potenti ... b-9mm.html

http://www.taydaelectronics.com/potenti ... b-9mm.html

http://www.taydaelectronics.com/potenti ... b-9mm.html

falafelbiels · Post by **falafelbiels** » Thu May 08, 2014 5:38 am

Built one up yesterday and found a few errors in the BOM. I edited it and the new BOM is uploaded to page 3 of this thread.

demian · Post by **demian** » Fri May 09, 2014 1:56 am

If still available i would like 2 sets with frontpanel. :-)

falafelbiels · Post by **falafelbiels** » Fri May 09, 2014 4:46 am

Okay Erwin, we'll see what happens. So far it looks like there is only one set left though. Still waiting for a reply from clochard...

falafelbiels · Post by **falafelbiels** » Mon May 12, 2014 5:52 pm

Sorry for the silence, I have been working a lot last couple of days.
It looks like shipping could be done for aroundÃ¢â€šÂ¬3,50 to anywhere. I am buying bubble envelopes tomorrow and I will check to see if that +/- Ã¢â€šÂ¬3,50 is correct in the post office.
More news tomorrow...

horstronic · Post by **horstronic** » Mon May 12, 2014 6:06 pm

falafelbiels · Post by **falafelbiels** » Wed May 14, 2014 11:20 am

I have sent you folks the bill. If you haven't received yours, please let me know.

falafelbiels · Post by **falafelbiels** » Wed May 14, 2014 4:13 pm

Okay boys, if you fill up the voiceboard it should look like this:

But in red...

Notice I left out the 33uF electrolythic capacitor. This is part of the level control and since the level control is not on this board as such (the little lvl pot does something a bit different) it is not needed.

falafelbiels · Post by **falafelbiels** » Wed May 14, 2014 4:15 pm

These are the actual PCBs you will be receiving:

falafelbiels · Post by **falafelbiels** » Wed May 14, 2014 4:20 pm

There are four unmarked capacitors on the voiceboard near the ICs. These are bypass capacitors and they can be anything from 10 to 100k.
There are 2 unmarked resistors next to the power header. These can be 10r or ferrite beads.
There are four unmarked transistors on the voiceboard. These are bc547.

falafelbiels · Post by **falafelbiels** » Wed May 14, 2014 4:25 pm

For a bit of a more heavy (lower tuned) sound, replace these 27n capacitors with something a bit bigger. I really enjoy the sound of 47n.
Replacing the 0,47u electrolythic with something bigger makes for a longer decay. 1uf does the job for me fine.

Barcode · Post by **Barcode** » Wed May 14, 2014 4:41 pm

This will work without the trigger button correct? I really don't need it.

Also, I will be sending payment tomorrow.

falafelbiels · Post by **falafelbiels** » Wed May 14, 2014 4:50 pm

Barcode wrote:This will work without the trigger button correct? I really don't need it.

Yeah sure, it will just not notice your not pushing the button that isn't there anyway

aladan · Post by **aladan** » Wed May 14, 2014 6:02 pm

Do you think we could sub any general purpose NPN for the 2N3704? I see they're readily and cheaply available but I don't have any in my parts drawers (but I do have hundreds of other types).

alltransistors.com (what an fantastic resource it is) lists a whole bunch of subs: http://alltransistors.com/crsearch.php? ... &caps=TO92

It looks like it's used in the noise EG/VCA section of the circuit, based on the schematic at

I have plenty of 2SC945 so I'll probably use those, unless you foresee an issue?

Thanks,
A.

falafelbiels · Post by **falafelbiels** » Thu May 15, 2014 7:13 am

I don't really foresee any troubles. The transistor is the part that actually generates the noise. The noise generator in the turing machine is a somewhat similar design and uses a 2n3904 and that is nothing special. Substituting it theoretically might result in the noise sounding somewhat different but how would you know? I have been using the specified part in my builds so right now I am no wiser than you...

Do let us know about your findings please.

falafelbiels · Post by **falafelbiels** » Thu May 15, 2014 8:20 am

Okay, I've been at the post office again today.

Horstronic
Duff
Clochard
qp
Aladan
EMWhite

you can go sit next to the door, waiting for the little package to drop. Take a little bottle of water with you, OK?

falafelbiels · Post by **falafelbiels** » Thu May 15, 2014 8:29 am

Here's a picture of how the two boards connect, using angled single row pin headers. Please do this last, because it is quite inconvenient to have to still solder in components after this. note that the "level100kA" pinholes are not used. don't solder in a pin header there!

MOD WIGGLER

MOD WIGGLER

808 snare PCBs